<template>
    <view class="uni-steps">
        <view :class="[direction === 'column' ? 'uni-steps__column' : 'uni-steps__row']">
            <view
                :class="[direction === 'column' ? 'uni-steps__column-text-container' : 'uni-steps__row-text-container']"
            >
                <view
                    v-for="(item, index) in options"
                    :key="index"
                    :class="[direction === 'column' ? 'uni-steps__column-text' : 'uni-steps__row-text']"
                >
                    <text
                        :style="{ color: index === active ? activeColor : deactiveColor }"
                        :class="[direction === 'column' ? 'uni-steps__column-title' : 'uni-steps__row-title']"
                        >{{ item.title }}</text
                    >
                    <text
                        :style="{ color: deactiveColor }"
                        :class="[direction === 'column' ? 'uni-steps__column-desc' : 'uni-steps__row-desc']"
                        >{{ item.desc }}</text
                    >
                </view>
            </view>
            <view :class="[direction === 'column' ? 'uni-steps__column-container' : 'uni-steps__row-container']">
                <view
                    v-for="(item, index) in options"
                    :key="index"
                    :class="[direction === 'column' ? 'uni-steps__column-line-item' : 'uni-steps__row-line-item']"
                    :style="{ height: direction === 'column' ? heightArr[index] + 'px' : '14px' }"
                >
                    <view
                        :class="[
                            direction === 'column' ? 'uni-steps__column-line' : 'uni-steps__row-line',
                            direction === 'column' ? 'uni-steps__column-line--before' : 'uni-steps__row-line--before'
                        ]"
                        :style="{
                            backgroundColor:
                                index <= active && index !== 0
                                    ? activeColor
                                    : index === 0
                                      ? 'transparent'
                                      : deactiveColor
                        }"
                    >
                    </view>
                    <view
                        v-if="index === active"
                        :class="[direction === 'column' ? 'uni-steps__column-check' : 'uni-steps__row-check']"
                    >
                        <uni-icons :color="activeColor" :type="activeIcon" size="14" />
                    </view>
                    <view
                        v-else
                        :class="[direction === 'column' ? 'uni-steps__column-circle' : 'uni-steps__row-circle']"
                        :style="{ backgroundColor: index < active ? activeColor : deactiveColor }"
                    />
                    <view
                        :class="[
                            direction === 'column' ? 'uni-steps__column-line' : 'uni-steps__row-line',
                            direction === 'column' ? 'uni-steps__column-line--after' : 'uni-steps__row-line--after'
                        ]"
                        :style="{
                            backgroundColor:
                                index < active && index !== options.length - 1
                                    ? activeColor
                                    : index === options.length - 1
                                      ? 'transparent'
                                      : deactiveColor
                        }"
                    />
                </view>
            </view>
        </view>
    </view>
</template>

<script>
/**
 * Steps 步骤条
 * @description 评分组件
 * @tutorial https://ext.dcloud.net.cn/plugin?id=34
 * @property {Number} active 当前步骤
 * @property {String} direction = [row|column] 当前步骤
 * 	@value row 横向
 * 	@value column 纵向
 * @property {String} activeColor 选中状态的颜色
 * @property {Array} options 数据源，格式为：[{title:'xxx',desc:'xxx'},{title:'xxx',desc:'xxx'}]
 */

export default {
    name: "UniSteps",
    props: {
        direction: {
            // 排列方向 row column
            type: String,
            default: "row"
        },
        activeColor: {
            // 激活状态颜色
            type: String,
            default: "#2979FF"
        },
        deactiveColor: {
            // 未激活状态颜色
            type: String,
            default: "#B7BDC6"
        },
        active: {
            // 当前步骤
            type: Number,
            default: 0
        },
        activeIcon: {
            // 当前步骤
            type: String,
            default: "checkbox-filled"
        },
        options: {
            type: Array,
            default() {
                return [];
            }
        } // 数据
    },
    data() {
        return {
            heightArr: []
        };
    },
    mounted() {
        //根据内容设置步骤条的长度
        if (this.direction === "column") {
            let that = this;
            //只能用类选择器，用id选择器所获取的元素信息不准确
            uni.createSelectorQuery()
                .in(this)
                .selectAll(".uni-steps__column-text")
                .boundingClientRect((data) => {
                    that.heightArr = data.map((item) => item.height + 1);
                })
                .exec();
        }
    }
};
</script>

<style lang="scss">
$uni-primary: #2979ff !default;
$uni-border-color: #ededed;

.uni-steps {
    /* #ifndef APP-NVUE */
    display: flex;
    width: 100%;
    /* #endif */
    /* #ifdef APP-NVUE */
    flex: 1;
    /* #endif */
    flex-direction: column;
}

.uni-steps__row {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: column;
}

.uni-steps__column {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: row-reverse;
}

.uni-steps__row-text-container {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: row;
    align-items: flex-end;
    margin-bottom: 8px;
}

.uni-steps__column-text-container {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: column;
    flex: 1;
}

.uni-steps__row-text {
    /* #ifndef APP-NVUE */
    display: inline-flex;
    /* #endif */
    flex: 1;
    flex-direction: column;
}

.uni-steps__column-text {
    padding: 6px 0px;
    border-bottom-style: solid;
    border-bottom-width: 1px;
    border-bottom-color: $uni-border-color;
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: column;
}

.uni-steps__row-title {
    font-size: 14px;
    line-height: 16px;
    text-align: center;
}

.uni-steps__column-title {
    font-size: 14px;
    text-align: left;
    line-height: 18px;
}

.uni-steps__row-desc {
    font-size: 12px;
    line-height: 14px;
    text-align: center;
}

.uni-steps__column-desc {
    font-size: 12px;
    text-align: left;
    line-height: 18px;
}

.uni-steps__row-container {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: row;
}

.uni-steps__column-container {
    /* #ifndef APP-NVUE */
    display: inline-flex;
    /* #endif */
    width: 30px;
    flex-direction: column;
}

.uni-steps__row-line-item {
    /* #ifndef APP-NVUE */
    display: inline-flex;
    /* #endif */
    flex-direction: row;
    flex: 1;
    height: 14px;
    line-height: 14px;
    align-items: center;
    justify-content: center;
}

.uni-steps__column-line-item {
    /* #ifndef APP-NVUE */
    display: flex;
    /* #endif */
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.uni-steps__row-line {
    flex: 1;
    height: 1px;
    background-color: #b7bdc6;
}

.uni-steps__column-line {
    width: 1px;
    background-color: #b7bdc6;
}

.uni-steps__row-line--after {
    transform: translateX(1px);
}

.uni-steps__column-line--after {
    flex: 1;
    transform: translate(0px, 1px);
}

.uni-steps__row-line--before {
    transform: translateX(-1px);
}

.uni-steps__column-line--before {
    height: 6px;
    transform: translate(0px, -13px);
}

.uni-steps__row-circle {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background-color: #b7bdc6;
    margin: 0px 3px;
}

.uni-steps__column-circle {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background-color: #b7bdc6;
    margin: 4px 0px 5px 0px;
}

.uni-steps__row-check {
    margin: 0px 6px;
}

.uni-steps__column-check {
    height: 14px;
    line-height: 14px;
    margin: 2px 0px;
}
</style>
